Life Sciences Commons^™

Sustainable Forestry In The Tropics: Panacea Or Folly?, David W. Pearce, Francis E. Putz, Jerome K. Vanclay

Professor Jerome K Vanclay

The profitability of uncontrolled logging can be a significant obstacle to sustainable forest management, especially in the tropics. Rice et al. (1997) have argued that not only does traditional selective logging provide higher returns but also incurs less damage to forests than sustainable forest management systems that involve harvesting of many species and the creation of large gaps in the forest canopy to foster regeneration of light-demanding species. They claimed that protected areas were the only viable way to conserve forest ecosystems and proposed that loggers be allowed to log forests selectively once, after which the forests should become parks. …

Forest Dynamics In Flood Plain Forests In The Peruvian Amazon: Effects Of Disturbance And Implications For Management, Gustav Nebel, Lars Peter Kvist, Jerome K. Vanclay, Hector Vidaurre

Professor Jerome K Vanclay

Forest dynamics were studied from 1993 to 1997 for individuals > 10 cm DBH in nine 1 ha permanent sample plots. They were established in natural flood plain forests located on the lower Ucayali river in the Peruvian Amazon. After inventories of three plots in each of three forest types, a light and a heavy felling treatment were applied to each of the two plots, while a third plot was kept untreated. Average annual stem mortality and recruitment rates in the untreated plots were among the highest observed in neotropical rain forests: mortality 2.2-3.2% per year, recruitment 3.0-4.6% per year. Dead …

The Effectiveness Of Parks, Jerome K. Vanclay

Professor Jerome K Vanclay

Bruner et al. examined the effectiveness of parks in the tropics, drawing on survey data to support their contention that parks 1) have been effective; 2) need more support; and 3) should remain a central component of conservation strategies. Their conclusions remain equivocal...

Experiment Designs To Evaluate Inter- And Intra-Specific Interactions In Mixed Plantings Of Forest Trees, Jerome K. Vanclay

Professor Jerome K Vanclay

A review of three mixed-species trials reveals the utility of competition indices for evaluating inter- and intra-specific interactions between trees, the desirability of experiments that span a range of tree spacing and composition to inform calibration of these competition indices, the need for extremes of species composition and stand density to calibrate response surfaces, and the far-reaching impact of edge-effects. Experiment layouts commonly used for mixed-species trials in forestry (such as replacement series) rarely provide a strong basis to calibrate competition indices and response surfaces. Alternative designs involving systematic changes in species composition may offer a better basis for calibrating …

How To Foster Good Husbandry Of Private Native Forests, Jerome K. Vanclay

Professor Jerome K Vanclay

It is generally agreed that effective conservation requires the cooperation of private landholders to complement reserve-based efforts, but there is little agreement about how this can best be achieved. Various stakeholders lobby for tough regulations, for greater landholder freedom, and for incentives for activities or outcomes. A review of these alternatives suggests an emerging consensus that incentives are the most effective approach. Policy-makers should consider incentive-based approaches such as stewardship support to foster conservation outcomes on private lands.

Why Model Landscapes At The Level Of Households And Fields?, Jerome K. Vanclay

Professor Jerome K Vanclay

Sustainable resource management relies upon many disciplines and deals with complex interactions at the landscape scale. Many of the issues at the landscape scale arise from decisions taken at the household level and affect land use in fields and in small patches of forest. Spatially-explicit modelling of these units is desirable because it enables rigorous testing of model predictions, and thus of underlying propositions. The greatest insights may be obtained by participatory modelling of these processes as we understand them. Despite this, few models simulate dynamics at the household and field level. FLORES, the Forest Land Oriented Resource Envisioning System, …

Diameter Growth Performance Varies With Species Functional-Group And Habitat Characteristics In Subtropical Rainforests, Maina Kariuki, Margaret Rolfe, R Geoff B. Smith, Jerome K. Vanclay, Robert M. Kooyman

Professor Jerome K Vanclay

We examined tree diameter growth in 20 plots subjected to various disturbance intensities (natural, low, moderate and intensive logging) in a bid to understand the general tree growth responses in relation to habitat characteristics in subtropical rainforests of north-eastern NSW, Australia. Species-specific regeneration strategy, maximum size and level of shade tolerance were used to classify species into five groups: emergent and shade tolerant main canopy (group 1), shade tolerant mid canopy (2), shade tolerant understoreys (3), moderate shade tolerant (4) and shade intolerant (5) tree species. Data series for trees ‗10 cm diameter at 1.3 m above the ground level …

Spiral And Interlocking Grain In Eucalyptus Dunnii, C Thinley, Graeme Palmer, Jerome K. Vanclay, Michael Henson

Professor Jerome K Vanclay

Spiral grain in 181 trees from a 9-year-old plantationgrown Eucalyptus dunnii was normally distributed with mean −0.33 degrees (to the left) and standard deviation 1.7 degrees, and was affected by family and by crown asymmetry. Interlocking grain was common, exhibiting a mean amplitude of 3.4 degrees (standard deviation 1.5◦) and a mean wavelength of 39 mm (standard deviation 12 mm). The relatively large amplitude of interlocking grain means that most trees will have spiral grain that alternates between left and right during each year. The wavelength of interlocking grain is influenced by tree size, but amplitude of interlocking is under …

A Long And Winding Road: The Regulation Of Private Native Forestry In New South Wales, Australia, Jerome K. Vanclay, J Doland Nichols

Professor Jerome K Vanclay

This special issue of Small-Scale Forestry is concerned with private native forestry (PNF) in New South Wales (NSW), Australia. Private native forests comprise indigenous species in a semi-natural formation on privately owned land. Such forests are usually uneven-aged, and regenerated naturally rather than by sowing or planting. These forests are of major conservation and commercial importance in NSW, covering 8 M ha and comprising one-third of all native forest in the state (Thompson 2007). The management and harvesting of these forests is known as PNF, and has been the focus of public attention for several years, as the desirability and …

Corn And Soybean Profitability 2010, Gregory S. Halich

Agricultural Economics Presentations

No abstract provided.

Grain Market Outlook, Cory G. Walters

Agricultural Economics Presentations

No abstract provided.

Summaries Of Arkansas Cotton Research 2008, Derrick M. Oosterhuis

Arkansas Agricultural Experiment Station Research Series

No abstract provided.

Wheat (Triticum Aestivum) Nam Proteins Regulate The Translocation Of Iron, Zinc, And Nitrogen Compounds From Vegetative Tissues To Grain, Brian M. Waters, Cristobal Uauy, Jorge Dubcovsky, Michael A. Grusak

Department of Agronomy and Horticulture: Faculty Publications

The NAM-B1 gene is a NAC transcription factor that affects grain nutrient concentrations in wheat (Triticum aestivum). An RNAi line with reduced expression of NAM genes has lower grain protein, iron (Fe), and zinc (Zn) concentrations. To determine whether decreased remobilization, lower plant uptake, or decreased partitioning to grain are responsible for this phenotype, mineral dynamics were quantified in wheat tissues throughout grain development. Control and RNAi wheat were grown in potting mix and hydroponics. Mineral (Ca, Cu, Fe, K, Mg, Mn, P, S, and Zn) and nitrogen (N) contents of organs were determined at regular intervals to …

Greer, James Francis, 1797-1871 (Sc 2044), Manuscripts & Folklife Archives

MSS Finding Aids

Finding aid and scan (Click on "Additional Files" below) for Manuscripts Small Collection 2044. Letter, 10 September 1861, from James Greer in Bloomfield, Nelson County, Kentucky, to A. H. Patch, Louisville, Kentucky. Greer reports unfavorably on his trial of a mower for harvesting crops.

Effect Of Water On Micronutrient Content And Yield In Rice (Oryza Sativa L.), Sheila Lorraine Baker

Master's Theses

Rice (Oryza sativa L.) is an important crop in many countries. According to the IRRI, more than 2 billion people globally depend on rice as a staple food (Dawe, et al. 2003). Studies on micronutrient content in rice and the effect of water in availability of the nutrients may aid in decreasing global nutrient deficiencies. Rice is grown under different water regimes such as AWD and intermittent flooding, sprinkler and furrow irrigation. A greenhouse pot experiment of rice utilizing a split plot design under different water regimes was conducted to assess the affect of water on (1) DTPA extractable soil …

Warren County Strawberry Growers' Association (Sc 2014), Manuscripts & Folklife Archives

MSS Finding Aids

Finding aid only for Manuscripts Small Collection 2014. Minute book, 1912-1915, by-laws, articles of incorporation, financial statements, and correspondence for the Association, as well as sundry receipts.

Impact Of Weed Management Practices On Grapevine Growth, Yield Components, Plant And Arthropod Abundance, And Carabid Seed Predation In Paso Robles Vineyard, Paolo Sanguankeo

Master's Theses

In the Central Coast of California, USA, wine grape growers are making efforts to identify weed control practices that promote biodiversity in their vineyards while maintaining yields. A field study was conducted in Paso Robles, CA in 2006 and 2007 evaluating the effect on Zinfandel grape-vine growth and production, groundcover plant, and ground dwelling arthropod communities of five weed control practices: 1) flumioxazin, 2) simazine, 3) cultivation, 4) cover crop, and 5) untreated control.

The herbicide treatments had the lowest weed biomass followed by the cultivation, being approximately 10 and 2 times lower than the weed biomass of either the …

Sugar Creek Creamery Company - Louisville, Kentucky (Sc 1976), Manuscripts & Folklife Archives

MSS Finding Aids

Finding aid and scan (Click on "Additional Files" below) for Manuscripts Small Collection 1976. Letter from Sugar Creek Creamery Company, Louisville, Kentucky, soliciting cream for manufacture of Sugar Creek butter.

Experiencia De Productoras Con El Uso De Harina De Sorgo: Por Años El Cultivo Del Sorgo Ha Sido Utilizado Para El Consumo Humano Y Animal, Roxana Ortiz, Eduardo Funes

INTSORMIL Impacts and Bulletins

En marzo del año pasado, la industria panifi cadora experimento los precios altos que sufrió la harina de trigo y en la búsqueda de nuevas alternativas algunos de ellos se interesaron en el uso de harina de sorgo para elaborar pan dulce y bebidas étnicas.

Es así que el Centro Nacional de Tecnología Agropecuaria y Forestal (CENTA) a través del Laboratorio de Alimentos impulsa esta tecnología. El interés de probar nuevas opciones llevo a muchas Panaderías, Asociaciones de Productoras, ONG, Industrias de Alimentos, Fundaciones y otras a capacitarse en el uso de esta harina.

W229-Interpreting Mehlich 1 And 3 Soil Test Extractant Results For P And K In Tennessee, The University Of Tennessee Agricultural Extension Service

Field & Commercial Crops

The Mehlich 1 and 3 soil test extractants are the most widely used in laboratories of the southern United States today. Tennessee began using the Mehlich 1 extractant in December, 1981. Existing soil test calibration data in Tennessee are based on the Mehlich 1 soil test extractant,1,2 which became available in 1953.

An Integrated Crop- And Soil-Based Strategy For Variable-Rate Nitrogen Management In Corn, Darrin F. Roberts

Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research

Nitrogen (N) management in cereal crops has been the subject of considerable research and debate for several decades. Historic N management practices have contributed to low nitrogen use efficiency (NUE). Low NUE can be caused by such things as poor synchronization between soil N supply and crop demand, uniform application rates of fertilizer N to spatially variable landscapes, and failure to account for temporally variable influences on soil N supply and crop N need. Active canopy reflectance sensors and management zones (MZ) have been studied separately as possible plant- and soil-based N management tools to increase NUE. Recently, some have …

Arkansas Small-Grain Cultivar Performance Tests 2008-2009, J. T. Kelly, T. S. Rainey, R. K. Bacon, E. A. Milus

Arkansas Agricultural Experiment Station Research Series

Small-grain cultivar performance tests are conducted each year in Arkansas by the Arkansas Agricultural Experiment Station, Department of Crop, Soil, and Environmental Sciences. The tests provide information to companies developing cultivars and/or marketing seed within the state and aid the Arkansas Cooperative Extension Service in formulating cultivar recommendations for smallgrain producers.

“Growing Up Green: A Study Focusing On Environmental Attitudes, Knowledge And Focusing On Environmental Attitudes, Knowledge And Behaviors Of Elementary Children.”, Sarah Elizabeth Smith

Masters Theses

“Growing Up Green,” is a research based environmental education program that teaches children about recycling, energy conservation, and composting. This program was taught to fourth grade students at H.B. Williams Elementary School, in White House, Tennessee. The children were given a pre-test before the program and a post-test two weeks after the program. The pre and post-test was composed of three parts. The three parts tested their environmental attitudes, knowledge, and behaviors. The study found that most of the children already had positive attitudes toward the environment. While, their attitudes decreased minimally after the program, they still remained very positive. …

Estimating Water Application Efficiency For Drip Irrigation Emitter Patterns On Banana, Alisson Jadavi Pereira Da Silva, Eugênio Ferreira Coelho, Jarbas Honorio De Miranda, Stephen Ray Workman

Biosystems and Agricultural Engineering Faculty Publications

The objective of this work was to evaluate root and water distribution in irrigated banana (Musa sp.), in order to determine the water application efficiency for different drip irrigation emitter patterns. Three drip emitter patterns were studied: two 4-L h^-1 emitters per plant (T1), four 4-L h^-1 emitters per plant (T2), and five 4-L h^-1 emitters per plant (T3). The emitters were placed in a lateral line. In the treatment T3, the emitters formed a continuous strip. The cultivated area used was planted with banana cultivar BRS Tropical, with a 3-m spacing between rows and a …

Rr10-01-2009 Wheat And Oat Variety Performance Tests In Tennessee, The University Of Tennessee Agricultural Extension Service

Field & Commercial Crops

No abstract provided.

B. R. Wells Rice Research Studies 2008, R. J. Norman, J. F. Meullenet, K. A. K. Moldenhauer

Arkansas Agricultural Experiment Station Research Series

No abstract provided.

Plant Growth Regulator Sprays And Girdling: Potential Horticultural Techniques To Increase Fruit Retention And Yield Of Longan (Dimocarpus Longan Lour.) Trees In California, Leila Anne Graves

Master's Theses

Abstract Plant Growth Regulator Sprays and Girdling: Potential Horticultural Techniques to Increase Fruit Retention and Yield of Longan (Dimocarpus longan Lour.) Trees in California Leila Graves June 2009 The longan is a subtropical fruit tree whose popularity is growing quickly among American consumers, and thus, could become a lucrative niche market for California growers. Trees planted as part of an initial variety trial conducted in commercial California orchards are beginning to bear fruit. However, fruit retention and yields are low due to excessive abscission during early fruit set. Horticultural techniques, such as plant growth regulator (PGR) sprays and girdling, often …

Usan Sorgo Para Hacer Pan: El Centa Capacita A Panifi Cadores Para Usar Esa Materia Prima, Roxana Ortiz

INTSORMIL Impacts and Bulletins

En marzo del año pasado, la industria panifi cadora experimento los precios altos que sufrió la harina de trigo. En la búsqueda de nuevas alternativas, algunos productores se interesaron en el uso de harina de sorgo para elaborar pan dulce y bebidas étnicas.

Por esa razón, el Centro Nacional de Tecnología Agropecuaria y Forestal (CENTA), a través del laboratorio de alimentos, impulsa esta tecnología.

Promueven Ventajas Nutritivas Del Sorgo: La Harina De Este Cereal Es Utilizada Para Elaborar Diversos Productivos Alimenticios, Roxana Ortiz

INTSORMIL Impacts and Bulletins

Horchata, tiste, atoles saborizados, poleadas, pudín, harina de afrecho, pan francés y dulce son productos elaborados a base de sorgo o maicillo y son mezclados con otros ingredientes, técnica impulsada por especialistas del laboratorio de alimentos del Centro Nacional de Tecnología Agropecuaria y Forestal (CENTA).

El proceso consiste en usar la harina sola de sorgo (100%) y mezclarla con otros cereales, rostizando el grano para la elaboración de bebidas o molido en seco para el desarrollo de otros productos.

Pasture Condition Guide For The Ord River Catchment, K Ryan, E Tierney, P Novelly

Bulletins 4000 -

This guide has been produced as a tool for assessing pasture condition over a range of pasture types in the Ord River catchment. A pasture type is a distinctive mix of plant species, soil type and landscape position. For example, the Mitchell Grass Alluvial Plain Pasture type is a mixture of Mitchell grasses and other species occurring on black soil alluvial plains.

Pasture condition is an important factor affecting the potential of the rangelands for animal production and is a useful indicator for the sustainability of production.